braryEzyBooks catalogHypothesis tests for the difference between two population meansCHALLENGE 8.1.3: Hypothesis testing for two population means (one-tailed t-test).ACTIVITY402.562.2600368.qx3zqy7Jump to level 1A sales manager for a large department store believes that customer spending per visit with a sale is lower thancustomer spending without a sale, and would like to test that claim. A simple random sample of customer spending istaken from without a sale and with a sale. The results are shown below.Without sale with saleMean82.90471.316Variance1984.961826.41Observations200150Hypothesized Mean Difference01 StatP(T<=t) one-tail0.0071t Critical one-tailP(T<=t) two-tail0.0142t Critical two-tail-163Confidence LevelP = EX 1.234Samples from without sale: niEx: 9Samples from with sale: n₂ =Point estimate for spending without sale: 1 = Ex: 1.234)Point estimate for spending with sale: ₂7O1-201RETIES

Given that: The sales manager believes that customer spending per visit with a sale is lower than…

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A market research firm used a sample of individuals to rate the purchase potential of a particular product before and after the individuals saw a new television commercial about the product. The purchase potential ratings were based on a 0 to 10 scale, with higher values indicating a higher purchase potential. The null hypothesis stated that the mean rating "after" would be less than or equal to the mean rating "before." Rejection of this hypothesis would show that the commercial improved the mean purchase potential rating. Use a = 0.05 and the following data to test the hypothesis and comment on the value of the commercial. Purchase Rating Individual After Before 1 6 5 6 4 3 7 4 4 3 3 8 8 6 State the null and alternative hypotheses. (Use u, = mean rating after - mean rating before.) O Ho: Hs0 H3: H = 0 O Ho: Hd#0 Hai Hq= 0 O Ho: Hg=0 O Ho: Hd> 0 Calculate the value of the test statistic. (Round your answer to three decimal places.) 1.183 Calculate the p-value. (Round your answer to…
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Another organization wants to perform a similar analysis on Department A’s and Department B’s performance evaluation scores. What is the Null Hypothesis (Ho:)? What is the Research Question or Alternative Hypothesis (Ha:)? Perform the t-Test and show the results (two sample assume equal variance). Dept A Dept B 3.1 3.1 3.6 3.1 3.2 3.2 3.5 3.4 3.1 3.2 2.9 3.3 3.5 3.1 3.6 2.9 3.7 3.1 3.5 3.6 2.9 3.2 3.2 3.3 3.6 3.4 3.5 3.3 3.4 3.1 2.9 2.8 3.4 2.9 3.3 3.1 3.5 3.2 3.4 3.1
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